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Finding the Fourth Proportional to 65,207.60, 97,840.20 and 30,129.20

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Solution

The fourth proportional to 65,207.60, 97,840.20 and 30,129.20 is: 45,207.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,207.60 : 97,840.20 = 30,129.20 : x
  2. Step 2: Convert to fraction form
    65,207.60/97,840.20 = 30,129.20/x
  3. Step 3: Cross multiply
    65,207.60x = 97,840.20 × 30,129.20
  4. Step 4: Simplify right side
    65,207.60x = 2,947,846,953.84
  5. Step 5: Solve for x
    x = 2,947,846,953.84/65,207.60
  6. Step 6: Final answer
    x = 45,207.11

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.